Combined Effects of Temperature and Salinity on the Growth and Survival of Fenneropenaeus meiguiensis

Abstract:

To investigate the optimal temperature and salinity for the Fenneropenaeus meiguiensisi, Central Composite Design (CCD) and Response Surface Method (RSM) were used to study the combined effects of temperature (16−35℃) and salinity (5−29) on the growth and survival of the F. meiguiensis, which will provide theoretical basis for the industrial culture of F. meiguiensis. The results showed that the linear and quadratic effects of temperature on the specific growth rate (SGR) and the survival rate (SR) of F. meiguiensis were significant (P<0.05). The linear effect of salinity on the SGR was not significant (P>0.05), but the effect on SR was significant (P<0.05). The quadratic effect of salinity on the SGR and SR were significant (P<0.01). The interactive effect of temperature and salinity on the SGR and SR of F. meiguiensis were not significant (P<0.05). Based on the response surface methodology analysis, a model equation about the relationship of the specific growth rate and survival rate to the two factors were established, which the R2 were 0.9014 and 0.9631, respectively, and the Adj. R2 were 0.8310 and 0.9367, respectively, suggesting that the model was satisfactory, and it could be practicably applied for predicting the variety of SGR and SR. Based on the established model, the SGR and SR reached the maximum (1.296%, 98.34%) at the 2-factor combination of 26.6℃/15.5, which had desirability value of 0.970. These results suggest that the optimization of temperature and salinity of F. meiguiensis were 26.6℃/15.5, which could offer theoretical reference for the production of the F. meiguiensis.